(19)
(11) EP 1 612 915 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
29.11.2006 Bulletin 2006/48

(43) Date of publication A2:
04.01.2006 Bulletin 2006/01

(21) Application number: 05013986.4

(22) Date of filing: 28.06.2005
(51) International Patent Classification (IPC): 
H02K 5/136(2006.01)
H02K 5/14(2006.01)
H02K 11/00(2006.01)
(84) Designated Contracting States:
AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IS IT LI LT LU MC NL PL PT RO SE SI SK TR
Designated Extension States:
AL BA HR LV MK YU

(30) Priority: 28.06.2004 US 878066

(71) Applicant: Reliance Electric Technologies, LLC
Mayfield Heights, Ohio 44124 (US)

(72) Inventors:
  • Orders, Marcus D.
    Kings Mountain NC 28086 (US)
  • Woodson, William T.
    Pelzer, SC 29669 (US)
  • Schiferl, Rich F.
    Chagrin Falls, Ohio 44022 (US)
  • Melfi, Michael J.
    Euclid, OH 44117 (US)

(74) Representative: Jung HML 
Schraudolphstrasse 3
80799 München
80799 München (DE)

   


(54) Method and apparatus for dissipating shaft charge


(57) The present invention relates generally to dissipation of shaft charge. According to an exemplary embodiment, the present invention provides a charge-dissipating device that includes a dissipation member disposed in an explosion-proof enclosure. When mounted to a rotatable shaft of an electric motor, for example, the dissipation member is configured to generally abut against the rotatable shaft. The dissipation member dissipates shaft-charge developed in the rotatable shaft during operation of the motor. By dissipating shaft charge, the likelihood of arcing and/or bearing current (Ib) occurrences are reduced or eliminated. In accordance with another exemplary embodiment, a transmission member is configured to impart a voltage signal onto the shaft.







Search report